tofsee | 19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2

General

Target

JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe
Size

277KB
MD5

a8301ded770dca5b37d8d125f8bbbb8b
SHA1

a6a90c8a0132c172cb384e803ea735de365b3859
SHA256

19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2
SHA512

c5a9d5a8957155d8bb006a6e75695bc8ed4d775bf7797869067d8c81192fe87003c122fde8f6d9031f2eeae852c996914ed0d0e26efbcc83ffad96e0c1ab054e
SSDEEP

3072:A/0FXt7yv4zdOPOPtGTRZEYWigNQsKZRVy8U/qed+pHMGrYv5QkA9UyYkDUa+1pB:AH+YP6otZai9Xy8qLiHMGr609UyYfXt

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Tofsee family
tofsee
Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1972	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\ykmmpexx\ImagePath = "C:\\Windows\\SysWOW64\\ykmmpexx\\gsztyerz.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe

Deletes itself 1 IoCs

pid	Process
4052	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4432	gsztyerz.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4432 set thread context of 4052	4432	gsztyerz.exe	98

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
1744	sc.exe
1708	sc.exe
3580	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4868	1144	WerFault.exe	81
2616	4432	WerFault.exe	92

System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gsztyerz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1144 wrote to memory of 3664	1144	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe	82
PID 1144 wrote to memory of 3664	1144	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe	82
PID 1144 wrote to memory of 3664	1144	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe	82
PID 1144 wrote to memory of 4464	1144	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe	84
PID 1144 wrote to memory of 4464	1144	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe	84
PID 1144 wrote to memory of 4464	1144	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe	84
PID 1144 wrote to memory of 1744	1144	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe	86
PID 1144 wrote to memory of 1744	1144	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe	86
PID 1144 wrote to memory of 1744	1144	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe	86
PID 1144 wrote to memory of 1708	1144	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe	88
PID 1144 wrote to memory of 1708	1144	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe	88
PID 1144 wrote to memory of 1708	1144	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe	88
PID 1144 wrote to memory of 3580	1144	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe	90
PID 1144 wrote to memory of 3580	1144	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe	90
PID 1144 wrote to memory of 3580	1144	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe	90
PID 1144 wrote to memory of 1972	1144	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe	93
PID 1144 wrote to memory of 1972	1144	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe	93
PID 1144 wrote to memory of 1972	1144	JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe	93
PID 4432 wrote to memory of 4052	4432	gsztyerz.exe	98
PID 4432 wrote to memory of 4052	4432	gsztyerz.exe	98
PID 4432 wrote to memory of 4052	4432	gsztyerz.exe	98
PID 4432 wrote to memory of 4052	4432	gsztyerz.exe	98
PID 4432 wrote to memory of 4052	4432	gsztyerz.exe	98

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1144
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ykmmpexx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3664
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gsztyerz.exe" C:\Windows\SysWOW64\ykmmpexx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4464
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ykmmpexx binPath= "C:\Windows\SysWOW64\ykmmpexx\gsztyerz.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1744
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ykmmpexx "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1708
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ykmmpexx
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3580
- C:\Windows\SysWOW64\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
  2⤵
  - Modifies Windows Firewall
  - Event Triggered Execution: Netsh Helper DLL
  - System Location Discovery: System Language Discovery
  PID:1972
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1144 -s 784
  2⤵
  - Program crash
  PID:4868

C:\Windows\SysWOW64\ykmmpexx\gsztyerz.exe
C:\Windows\SysWOW64\ykmmpexx\gsztyerz.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_19bcbeb0b9f81c775fa96cddac76e5d3a55f65ed580ea93d452e656f3d1231e2.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4432
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4052
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4432 -s 512
  2⤵
  - Program crash
  PID:2616

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1144 -ip 1144
1⤵
PID:3536

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4432 -ip 4432
1⤵
PID:2232

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\gsztyerz.exe

Filesize
10.5MB

MD5
4450f40d1f4445a581de3c8e375a22c4

SHA1
4547f15b81c201691b2905a4982f03fbe4867c6a

SHA256
9b04b3006d49414b8573a6a9672eaf5cee889a7410068f4417b111783a99b24e

SHA512
2ab65e693b25973bd7396cb34d4c172e546865b99f25b6c00e95aa714d5c482e59eff5b591d2fc8c4e359da7afb37e06b65f875b699c2ff253b68fe7a42acb70

Download Submit
memory/1144-1-0x0000000002E60000-0x0000000002F60000-memory.dmp

Filesize
1024KB

Download
memory/1144-2-0x0000000004AE0000-0x0000000004AF3000-memory.dmp

Filesize
76KB

Download
memory/1144-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1144-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1144-9-0x0000000004AE0000-0x0000000004AF3000-memory.dmp

Filesize
76KB

Download
memory/1144-8-0x0000000000400000-0x0000000002D9C000-memory.dmp

Filesize
41.6MB

Download
memory/4052-11-0x0000000000A90000-0x0000000000AA5000-memory.dmp

Filesize
84KB

Download
memory/4052-13-0x0000000000A90000-0x0000000000AA5000-memory.dmp

Filesize
84KB

Download
memory/4052-14-0x0000000000A90000-0x0000000000AA5000-memory.dmp

Filesize
84KB

Download
memory/4432-15-0x0000000000400000-0x0000000002D9C000-memory.dmp

Filesize
41.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads